Improvement in oleaginous-seed crushers



A. B. LAWTHER. Oleaginous-Seed Crusher.-

No. 222,591. Patented Dec. 16, I879.

- driven by power and friction alternately.

UNITED STATES PATENT GFFIGE ALFRED B. LAWTHER, on CHICAGO, ILLINoIs.

IMPROVEMENT IN QLEAGINOU S-SEED CRUSHERS.

I Specification forming part of Letters Patent No. 222,591, datedDecember 16, 1879; application filed November 7, 1879.

To all whom it may concern:

Be it known that I, ALFRED B. LAWTHER, of Chicago, in the county of(look and State of Illinois, have invented certain Improvements inMachines for Crushing Oleaginous Seeds, of which the following is aspecification.

This invention relates to a machine for crushin g oleaginous seeds of"the general character shown and described in Letters Patent No. 180,770,dated August 8, 1876, consisting of crushing-rolls mounted in verticalframes and In using machines so constructed, in which part of the rollsare driven by power and part by friction from the power-driven rolls, Ihave found that the rolls driven'by friction of two adjacent rolls, oneabove and one below, tend, as they are momentarily controlled by one orother of the driving-rolls, to vibrate laterally to the extent of anylooseness in the bearings.

This vibration, in addition to causing an unpleasant noise, which issufficient at times to interfere with the comfort of people in thefactory, also rapidly wears the bearingsurfaces. This wear, in turn,increases the vibration, thus rendering frequent repairs necessary. I Toremedy this defect is the object of the present invention, and Iaccomplish it by mounting the rolls one above the other in such mannerthat the axes of the alternate rolls do not lie in the same verticalplane, the effect being to produce a wedging action between the rolls,which has a tendency to keep each alternate roll in opposite directionsclose to the frames in which they are placed. Unavoidable wear in such astructure, instead of increasing the vibration, will rather tend toincrease thewedgi'ng action, thus effectually preventing any vibration,rendering repairs of less urgency.

In the accompanying drawings, which form a part of this specification,is shown at Figure l a front view of a set of rolls of my improvedconstruction, and at Fig. 2 an end view of the same.

In the example shown three rolls are given as being sufficient number torepresent the principle of the invention; but it will be understood thatany number of rolls may be en ployed which is found desirable.

In the said drawings, A represents one of the rolls, which is driven bypower, which may be applied to a band-wheel upon its axis. A A are thealternate rolls, one above and the other below the power-driven roll,and driven by friction from the latter. All of the rolls are jonrnaledin sliding boxes B, mounted in an upright slideway, (J, at each end ofthe rolls, so that the weight of the rolls will rest one upon the other.

It will be seen by reference to the drawings that the axes a ofthe.rolls are so journaled in the boxes as that the power-driven roll isat one side, and the friction-driven roll at the other side, of thecenter, whichproduces the wedging action of the rolls above referred to.

The amount of divergence of the axes from a coincident line may, ofcourse, be varied in the judgment of the constructer to suit therequirements of the particular service, diameter of rolls, and speed ofrevolution.

I find that with rolls twelve inches in diame ter, revolving at a rateof one hundred and seventy-five to one hundred and eighty revolntionsper minute, a divergence of the axes from a coincident vertical line ofa quarter of an inch gives good results.

My invention may also be used with good effect where all the rolls aredriven by power, as is sufficiently obvious.

I claim The combination of crushingrolls mounted in an upright frame andresting one upon the other, and having their centers of motionalternately upon opposite sides of the central line, for the purpose ofproducing a wedging action between the rolls to obviate vibration,substantially as specified.

ALFRED B. LAWTHER.

Witnesses:

' Enw. S. EvAR'rs, H. M. MmvDAY.

